DESCRIPTION
●The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count. TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.
●The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.
●A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.
●FEATURES
●• 3.5-V to 28-V Wide Input Voltage Range
●• Up to 1.7-A Maximum Continuous Output Loading Current
●• Pulse Skipping Mode to Achieve High Light Load Efficiency
●• High Light Load Efficiency
●• Frequency Spread Spectrum to Reduce EMI
●• Adjustable 50-kHz to 1.1-MHz Switching
● Frequency Set by an External Resistor
● (Leave pin ROSC floating. Set frequency to
● 120 kHz and ground connection to 70 kHz)
●• Frequency Spread Spectrum to Ease EMI Issue
●• Peak Current-Mode Control
●• Cycle-by-Cycle Over Current Protection
●• External Soft Start
●• Available in SOIC8 Package
●APPLICATIONS
●• 5-V, 9-V, 12-V and 24-V Distributed Power Systems
●• Consumer Applications Such as Home Appliances, Set-Top Boxes, CPE Equipment, LCD Displays, Peripherals, and Battery Chargers
●• Industrial and Car Entertainment Power Supplies
